Stem-winding watch



(Model.)

D. A. A. BUCK.

Stem Winding Watch.

No. 234,236. Patented Nov. 9,1880.

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1 UNITED STATES PATENT OFFICE.

D. AZRO A. BUCK, OF WATEBBURY, CONNECTICUT.

STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent No. 234,236, dated November 9, 1880.

Application filed April 5, 1880.

To all whom "it may concern:

Be it known that I, D. AZRO A. BUCK, of Waterbury,-in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Stem- Winding WVatches; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a perspective view of my mechanism as applied to the case of a watch, the train being removed with the exception of the spring-wheel. Figs. 2 and 3 are elevations of the inner side of said mechanism, and show, respectively, the outer gear and the center gear in engagement with said spring-wheel, and Fig. 4 is a perspective view of said mechanism separated from said case.

Letters of like name and kind refer to like parts in each of the figures.

The design of my invention is to facilitate the winding of a watch-spring by enabling the same to be accomplished by movement of the stem in each direction; and to this end it consists, principally, in a stem-winding attachment for watches in which rotation of the stem in each direction operates to rotate the spring wheel or barrel or winding-arbor in a forward direction, substantially as and for the purpose hereinafter specified.

It consists, further, in combining with the stem-gear of a watch-movement two gearwheelsjournaled upon a plate which is pivoted centrally, so as to permit either of said wheels to mesh with a spring wheel or barrel or other toothed rotating part, substantially as and for the purpose hereinafter shown.

In the annexed drawings, A represents a case-center provided with a pendant, B, within which is journaled a stem, C, that, upon its outer end, has a crown, c, and upon its inner end has secured a spur-gear, D.

At one side of the gear-wheel D an oblong plate, E, is pivoted centrally upon the inner face of the case-center A, and upon the inner face of said plate are journaled two spur-gear wheels, F and F, that have equal diameter and mesh together.

Upon the rear side of the gear-wheel F is secured a pinion, f, which meshes with the stemwheel D, so that the rotation of said stem will cause said pinion, said gear F, and the gear F to revolve.

The diameters of the gear-wheels F and F (ModcL) are such as to enable the plate E to oscillate sufficiently to cause either of said wheels to mesh with the teeth of a spring-wheel, Gr, (pivoted at or within the rear side of the case,) without interference with the dial.

As arranged, the movement of the stem-gear D in one direction will cause the contiguous end of the plate E to move away from the rear side of the case, so as to disengage the gearwheel F from the spring-wheel G, and to cause the outer wheel, F, to be engaged with the .latter, as seen in Fig. 2, while, upon turning said stem-wheel D in an opposite direction, said plateE will be turned upon its axial hearing, so as to release said outer wheel, F, from engagement with said spring-wheel, and to throw said wheel F into engagement with the same, as shown in Fig. 3, the result being a movement of said spring-wheel in the same direction, whichever direction said stem-wheel is rotated.

This construction enables a watch to he wound without removing the fingers from the crown c, the latter being turned back and forth, and each movement operating to move forward the spring-wheel.

It will be seen that the mechanism described can be applied to the winding-arbor of an ordinary watch by pivoting the plate E upon the watch-plate in position to enable each wheel F and F to be thrown into engagement with a gear-wheel placed upon said arbor, and using a bevel-gear and bevel-pinion in place of the stem-wheel D and pinionf.

Having thus fully set forth the nature and merits of my invention, what I claim as new is 1. A stem-winding attachment for watches in which rotation of the stem in each direction operates to rotate the spring wheel or barrel 9 

